Just got this computer 2 weeks ago and its already failing me, can someone help?

[Microsoft Windows]

I restarted my computer around 10 minutes ago, and the system went through an update. Then, when I tried to sign it, it crashed. Now, the PC is telling me that the PIN isn't working, and I need a new pin. For the new PIN, I need internet. Problem; the PC isnt letting me connect to ANY wifi whatsoever. I've restarted the computer numerous times to no change. Is there any solution to this?

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